光纤Fabry-Perot超声传感系统设计与应用  

Design and application of optical fiber fabry-perot sensing system for detecting ultrasonic waves

作　　者：单宁[1] 史仪凯[1] 赵江海[1] 姚钦[1] 袁小庆[1] 

机构地区：[1]西北工业大学机电学院,陕西西安710072

出　　处：《光电子．激光》2008年第7期881-883,共3页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(50275125);航空科学基金资助项目(04I53068)

摘　　要：设计一非本征光纤Fabry-Perot(F-P)干涉腔,采用优化方法确定干涉腔长度和两路输出光波长。建立基于双波长稳定技术的低细度光纤F-P传感系统,进行激光超声信号的检测。实验结果表明,该传感器检测微位移时灵敏度较高,达到0.468°/nm;可以有效检测试样中激发出的超声信号,在降低成本的情况下频响达到1.4MHz。An extrinsic optical fiber F-P interference cavity is designed.The cavity length and wavelengths of two output light are gotter by adopting optimize method.Based on the technique of dual optical wavelength stabilization,the system of low fineness optical fiber F-P sensor is established.The laser ultrasound signals wre detected by using this sensor.The results show this sensor has higher sensitivity for detecting micro-displacement and reaches to 0.468°/nm,and the response frequency can reach to 1.4 MHz.

关 键 词：激光超声 光纤传感器 法布里-珀罗干涉腔 优化设计 

分 类 号：TN253[电子电信—物理电子学] TP212.14[自动化与计算机技术—检测技术与自动化装置]